Gravity Forms - pass donation data to Google Analytics via query string (Genesis version)

genesis_gravity_forms_analytics_tracking.php

<?php
/* This is built upon @jg314's really useful gist here https://gist.github.com/jg314/7591169 I have updated it for Universal Analytics tracking
rather than the older ga.js version*/

// Add this bit to your functions.php file

/*
 * Add custom query vars to handle Google Analytics Ecommerce tracking.
 * This should be placed in a plugin or in functions.php of the theme.
 *
 * You'll want to use the redirect method for Gravity Forms confirmations and 
 * turn on passing field data via a query string.  An example we used was:
 * donation_amount={Donation Amount:13}&donation_id={entry_id}&donation_recurring=0
 */
function sm_add_query_vars( $vars ){
  $vars[] = "donation_amount";
  $vars[] = "donation_id";
  $vars[] = "donation_recurring";
  
  return $vars;
}
add_filter( 'query_vars', 'sm_add_query_vars' );

// Create a Genesis page template like page-123.php for whatever your confirmation page is, and add this code to it
// SINGLE DONATION THANKS PAGE

//Place the following directly into the page template used for your donation thank you page.
//Track donation through Google Analytics Ecommerce Tracking
add_action( 'genesis_after', 'biscuits_donation_ga' );

function biscuits_donation_ga( $query ) {

$donation_amount = get_query_var( 'donation_amount' );

 if( $donation_amount != '' ): //Only do Ecommerce if the donation amount is in query vars
  
  //Donation Amount
  $donation_amount = filter_var( $donation_amount, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION );
  $donation_amount = number_format( $donation_amount, 2, '.', '' );

  //Gravity Forms Transaction ID
  $donation_id = get_query_var( 'donation_id' );
  $donation_id = intval( $donation_id );

  //Whether Donation is Recurring or One-Time
  $donation_recurring = get_query_var( 'donation_recurring' );
  $donation_recurring = intval( $donation_recurring );
  $donation_recurring_sku = ( $donation_recurring == 1 ) ? 'RD' : 'OTD';
  $donation_recurring = ( $donation_recurring == 1 ) ? 'Recurring Donation' : 'One-Time Donation';
  
?>
 
  <script type="text/javascript">
  
  	// console.log('amount <?php echo $donation_amount; ?>'); // Uncomment for testing purposes
  	ga('require', 'ecommerce');

	ga('ecommerce:addTransaction', {
	  'id': '<?php echo $donation_id; ?>',                     // Transaction ID. Required.
	  //'affiliation': 'Acme Clothing',   // Affiliation or store name.
	  'revenue': '<?php echo $donation_amount; ?>',               // Grand Total.
	  //'shipping': '5',                  // Shipping.
	  //'tax': '1.29'                     // Tax.
	});
   
    ga('ecommerce:addItem', {
	  'id': '<?php echo $donation_id; ?>', // Transaction ID. Required.
	  'name': '<?php echo $donation_recurring; ?>', // Product name. Required.
	  'sku': '<?php echo $donation_recurring_sku; ?>',// SKU/code.
	  //'category': 'Party Toys',         // Category or variation.
	  'price': '<?php echo $donation_amount; ?>', // Unit price.
	  'quantity': '1'   // Quantity.
});
   ga('ecommerce:send');  
  </script>
      
<?php endif; //End Google Analytics Ecommerce Tracking 
}

genesis();